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This article introduces the relevant knowledge of "which PHP registry modes are there". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Here three categories of registry classes (request level, session level, and application level) are mainly introduced by scope.

Namespace woo\ base;// base class abstract class Registry {abstract protected function get ($key); abstract protected function set ($key,$val);} / / request level, whose life cycle is usually class RequestRegistry extends Registry {private $values = array (); private static $instance from the time the user initiates a request to the time the daemon replies to the request Private function _ _ construct () {} static function instance () {/ / singleton, that is, there is only one unique instance of this class: if (! isset (self::$instance)) {self::$instance = new self ();} return self::$instance;} protected function get ($key) {if (isset ($this- > values [$key]) {return $this- > values [$key];} return null } protected function set ($key,$val) {$this- > values [$key] = $val;} static function getRequest () {return self::instance ()-> get ('request');} static function setRequest (\ woo\ controller\ Request $request) {/ /\ woo\ controller\ Request the main function is a class return self::instance ()-> set (' request',$request) that handles user request information }} / / session level. In this example, the lifetime of a class mainly depends on the lifetime of SESSION: class SessionRegistry extends Registry {private static $instance; private function _ construct () {session_start ();} static function instance () {if (! isset (self::$instance)) {self::$instance = new self ();} return self::$instance } protected function get ($key) {if (isset ($_ session [_ _ CLASS__] [$key]) {return $_ session [_ _ CLASS__] [$key];} return null;} protected function set ($key,$val) {$_ session [_ CLASS__] [$key] = $val;} function setComplex (Complex $complex) {self::instance ()-> set ('complex',$complex) } function getComplex () {return self::instance ()-> get ('complex');}} / / Application level. In this example, because the relevant values are saved in a text file, as long as the file exists, the saved values always exist class ApplicationRegistry extends Registry {private Static $instance; private $freezedir =' data'; private $values = array (); private $mtimes = array () Private function _ _ construct () {} static function instance () {if (! isset (self::$instance)) {self::$instance = new self ();} return self::$instance;} protected function get ($key) {$path = $this- > freezedir. DIRECTORY_SEPARATOR. If (file_exists ($path)) {clearstatcache (); / / clear the last recorded file modification time of the filemtime cache $mtime = filemtime ($path); if (! isset ($this- > mtimes [$key])) {$this- > mtimes [$key] = 0 } if ($mtime > $this- > mtimes [$key]) {/ / if the file content has been modified, it is necessary to retrieve the value $data = file_get_contents ($path); $this- > mtimes [$key] = $mtime; return ($this- > values [$key] = unserialize ($data);} if (isset ($this- > values [$key])) {return $this- > values [$key] } return null;} protected function set ($key,$val) {$this- > values [$key] = $val; $path = $this- > freezedir. DIRECTORY_SEPARATOR. $key; file_put_contents ($path,serialize ($val)); $this- > mtimes [$key] = time ();} static function getDSN () {return self::instance ()-> get ('dsn');} static function setDSN ($dsn) {return self::instance ()-> set (' dsn',$dsn);}} "which PHP registry modes" are introduced here, thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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